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【判断题】
凹凸面对焊钢法兰凸出部分的直径和凹下部分的直径相等。
A.
正确
B.
错误
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举报参考答案：
举一反三
【多选题】Q345和Q245钢法兰在下列任一情况下应经正火热处理：（）
A.
法兰断面厚度大于50mm
B.
法兰断面厚度大于60mm
C.
锻制法兰
D.
带颈法兰（热轧或锻制）
【单选题】Questions 62 to 66 are based on the following passage. If a mother pushes her small son in a swing (秋千), giving only a light force each time he returns, eventually he will be swingirg.quite high. The ...
A.
the speed of a motor in revolutions
B.
the frequency at which a motor vibrates
C.
the amplitude of an engine that oscillates
D.
the changes in a dial within a ear engine
【单选题】Questions 62 to 66 are based on the following passage. If a mother pushes her small son in a swing (秋千), giving only a light force each time he returns, eventually he will be swingirg.quite high. The ...
A.
vibrate
B.
resonate
C.
swing
D.
oscillate
相关题目：
【多选题】Q345和Q245钢法兰在下列任一情况下应经正火热处理：（）
A.
法兰断面厚度大于50mm
B.
法兰断面厚度大于60mm
C.
锻制法兰
D.
带颈法兰（热轧或锻制）
【单选题】Questions 62 to 66 are based on the following passage. If a mother pushes her small son in a swing (秋千), giving only a light force each time he returns, eventually he will be swingirg.quite high. The ...
A.
the speed of a motor in revolutions
B.
the frequency at which a motor vibrates
C.
the amplitude of an engine that oscillates
D.
the changes in a dial within a ear engine
【单选题】Questions 62 to 66 are based on the following passage. If a mother pushes her small son in a swing (秋千), giving only a light force each time he returns, eventually he will be swingirg.quite high. The ...
A.
vibrate
B.
resonate
C.
swing
D.
oscillate
参考解析：
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